我有一个用go和gin写的应用程序，这个文件划分如下：

main.go 
    controller 
        controllers.go 
    database    
        database.go 
    middleware 
        middleware.go 
    models 
        models.go 
    routes 
        routes.go 
go.mod 
go.sum 
Dockerfile

在每个文件夹中，我都有一个调用另一个包的包，例如：

package controller

import (
    "log"
    "net/http"
    "os"

    gomail "gopkg.in/mail.v2"

    "github.com/dgrijalva/jwt-go"
    "github.com/gin-gonic/gin"
    models "github.com/guilherm5/login-user/models"
)

package routes

import (
    "github.com/gin-gonic/gin"
    controller "github.com/guilherm5/login-user/controller"
    middleware "github.com/guilherm5/login-user/middleware"
)

我的go.mod是这样的：

module github.com/guilherm5/login-user


go 1.20

require (
    github.com/dgrijalva/jwt-go v3.2.0+incompatible
    github.com/gin-gonic/gin v1.9.0
    github.com/golang-jwt/jwt v3.2.2+incompatible
    github.com/joho/godotenv v1.5.1
    github.com/lib/pq v1.10.9
    golang.org/x/crypto v0.9.0
    gopkg.in/mail.v2 v2.3.1
)

require (
    github.com/bytedance/sonic v1.8.0 // indirect
    github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
    github.com/gin-contrib/sse v0.1.0 // indirect
    github.com/go-playground/locales v0.14.1 // indirect
    github.com/go-playground/universal-translator v0.18.1 // indirect
    github.com/go-playground/validator/v10 v10.11.2 // indirect
    github.com/goccy/go-json v0.10.0 // indirect
    github.com/json-iterator/go v1.1.12 // indirect
    github.com/klauspost/cpuid/v2 v2.0.9 // indirect
    github.com/leodido/go-urn v1.2.1 // indirect
    github.com/mattn/go-isatty v0.0.17 // indirect
    github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
    github.com/modern-go/reflect2 v1.0.2 // indirect
    github.com/pelletier/go-toml/v2 v2.0.6 // indirect
    github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
    github.com/ugorji/go/codec v1.2.9 // indirect
    golang.org/x/arch v0.0.0-20210923205945-b76863e36670 // indirect
    golang.org/x/net v0.10.0 // indirect
    golang.org/x/sys v0.8.0 // indirect
    golang.org/x/text v0.9.0 // indirect
    google.golang.org/protobuf v1.28.1 // indirect
    gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
    gopkg.in/yaml.v3 v3.0.1 // indirect
)

所以它会跟随我的应用程序的流程。
我想制作一个这个应用的docker镜像（出于学习的目的，我想学习docker的基础知识所以制作了这个API用于测试）
docker镜像：

FROM golang:1.20 as build 

WORKDIR /mail 

COPY go.sum ./
COPY go.mod ./
COPY main.go ./

RUN go mod download
RUN go build -o /appMail

FROM gcr.io/distroless/base-debian10

WORKDIR /

COPY --from=build /mail /mail

EXPOSE 4000/

USER nonroot:nonroot 

ENTRYPOINT ["/appMail"]

当我试图构建图像时，我得到了错误：

=> ERROR [build 7/7] RUN go build -o /appMail             0.7s 
------
 > [build 7/7] RUN go build -o /appMail:
#13 0.680 main.go:5:2: no required module provides package github.com/guilherm5/login-user/routes; to add it:
#13 0.680       go get github.com/guilherm5/login-user/routes   
------
executor failed running [/bin/sh -c go build -o /appMail]: exit code: 1

有人知道为什么吗我真的不知道该怎么解决这个问题，我怎么才能把我的包导入到docker镜像中呢？
--编辑
我按照建议更新了我的Dockerfile：

FROM golang:1.20 as build 

WORKDIR /mail 

COPY go.sum ./
COPY go.mod ./
COPY main.go ./

RUN go mod tidy
RUN go mod download
RUN go build -o /appMail

FROM gcr.io/distroless/base-debian10

WORKDIR /

COPY --from=build /mail /mail

EXPOSE 4000/

USER nonroot:nonroot 

ENTRYPOINT ["/appMail"]

错误：

github.com/guilherm5/login-user imports
#12 9.121       github.com/guilherm5/login-user/routes: cannot find module providing package github.com/guilherm5/login-user/routes: module github.com/guilherm5/login-user/routes: git ls-remote -q origin in /go/pkg/mod/cache/vcs/a7be81f5c5695c6941aa1b7f5a49aa0800b2d648c4d72609eb5feae6f51cf505: exit status 128:
#12 9.121       fatal: could not read Username for 'https://github.com': terminal prompts disabled
#12 9.121 Confirm the import path was entered correctly.        
#12 9.121 If this is a private repository, see https://golang.org/doc/faq#git_https for additional information.
------
executor failed running [/bin/sh -c go mod tidy]: exit code: 1